For me Insomniac certainly has shown the most impressive 3rd party performance as a company for next-gen systems so far.
Judging from the scans the game doesn't only seem graphically more advanced than the first Resistance game, but a lot more complex in other areas as well (for example the dropship!). And then the features which have been revealed were almost too good to be true!
Both Killzone 2 and Resistance 2 have been my most anticipated games since many months (Killzone 2 since the beginning, Resistance 2 since finishing Resistance 1), both games look like being amazing fun. The more the better! 8-)